Python 基本语法

#coding=utf-8
a=1
b=2
c=3
#if else
if a==1:
    print("a=1")
else:
    print("a!=1")

#if elif
if b==3:
    print("b=3")
elif c==4:
    print("c=4")
else:
    print("c!=4")
# 三目运算符
print("表达式1" if c==3 else "表达式2")

#循环语句
index=0
while index<5:
    index+=1
    print("while {0}".format(index))
else:
    print("While Over")
index=0
for num in range(0,5):
    print("for {0}".format(num))
else:
    print("For Over")

for num in range(5):
    if num==3:
        print("num==3 break")
        break   # or continue